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(Mode1.) 2 Sheets-Sheet 1'.

T. A. EDISON.

ELECTRIC LAMP AND HOLDER FOR THE SAME.

Patented Oct. 3, 1832.

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T. A. EDISON.

ELECTRIC LAMP AND HOLDER FOR THE SAME.

Patented Oct. 3,, 1882..

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UNITED STATES PATENT Orrroa.

THOMAS A. EDISON, OF MENLO PARK, NEW JERSEY, ASSIGNOR ""0 THE EDISONELECTRIC LIGHT COMPANY, OF NEW YORK, N. Y.

ELECTRIC LAMP AND HOLDER FOR THE SAME.

SPECIFICATION forming part of Letters Patent No. 265,311, dated October3, 1882.

Application filed February 5, 1880. Renewed August 14, 1882. (Model.)Patented in England February 10, 1880, No. 5'78; in Italy April 28,1880; in Belgium April 30, 1880, No. 51,155; in Victor ia June 15, 1880,No. 2,842; in France June 10, 1880, No. 130,088

in India June .23, 1880, N0. 415; in Sweden June 25,1880; in Canada July19, 1880, No. 11,520; in New South Wales July 20, 1880; in QueenslandAugust 3, 1880; in Austria-Hungary August 13, 1880 in Portuga. September1880, No. 021 in Norway September 24, 1880; in New Zealand October 18,1880, No. 484; in Russia December 14, 1881; in Germany December 31,188l, No. 15,602,

and in Spain January 2, 1882.

To all whom it may concern:

Be it known that I, THOMAS A. EDISON, of Menlo Park, New Jersey, haveinvented a new and useful Electric Lamp and Holder for the Same, (CaseNo. 201,) of which the following is a specification.

In order to adopt a system of electric lighting for ordinary anddomestic uses, it seems essential that a lamp should be devised completein itself, so that it may be supplied as a separate article ready forattachment to a suitable support, and with conductors so arranged thatwhen the lamp is placed in position the circuit-connections arecompleted without further adjustment, and the holder or socket forreceiving the lamp should be arranged to subserve this purpose, thisthat there may be no ditliculty encountered, no skilled care orattention needed in placing the lamps in position or in replacing onewhich from breakage or any cause whatever should become disabled.

The object of this invention is to attain this; and to that end itconsists in an electric lamp as a separate article adapted to be readilyplaced upon or within or removed from a suitable holder, and in a socketor holder as a separate article adapted to receive and support upon orwithin it an electric lamp, and in the combination of these two separatearticles and proper contacts for completing the electric circuit, and inother features more particularly hereinafter described and claimed.

Referring to the drawings hereto annexed, and forming part of thisspecification, Figure 1 is an elevation of my improved lamp and socketmounted on any suitable support. Fi 2 is a view of the separate lamp.Fig. 3 is a longitudinal section of the socket, and Fig. 4. is across-section of Fig. 3 near the circuit-closing screw. v

The lamp is composed of the glass globe F, formed with a neck, V, intowhich is slipped the glass portion 0, having at its upper end the bulbT, which supports and into which are securely fastened the conductors 56, leading to P, which is some material capable of being renderedincandescent by an electric current. 0 and V are hermetically sealed byfusion at S, after which the globe F is exhausted of air, when it issealed by fusion at (1, thus making the lamp consist of a globepractically of one piece of glass hermetically inclosing in a vacuum amaterial, P, adapted to be rendered incandescent by an electric current.The extention V of globe F and the part O form a neck suitably elevatingand supporting the globe. Thus far this lamp is more fully described inan application for a patent filed by me in the United States PatentOffice on December 11, 1879.

Upon the lower end of the part 0 is secured a cylinder, M, of anysuitable insulating material, provided on opposite sides with metallicsprings or contact-pieces 3 4. From the clamps c c, which hold andsupport the incandescent are P, the conductors 5 0 lead to thecontactpieces 3 4-, adapted to complete the electrical circuit when thelamp is placed in position in the holder hereinafter to be described.This construction forms a separate electric lamp, which may readily beremoved from or placed upon or within a suitable holder, the act ofplacing the lamps in position completing without adjustment or attentionthe necessary circuit-connections to the light-giving portion.

A is the socket or holder for receiving the lamp. It is made of suitableinsulating material, shaped and ornamented as maybe desired, receivingand supporting the neck of the electric lamp, and fashioned at one endso as to be fastened into agas-fixture or other suitable support. Asshown in the annexed drawings, it is a cylinder hollowed out from thetop with a screw-threaded aperturein the base, by which it is attachedto the bracket or chandelier arm I. Upon the interior are the metallicplates B G, insulated from each other. Upon the exterior, so that a linepassing through it will strike one of the inner platesin this case Gisthe metallic nut D, insulated from C, in which works the metallic screwE. A conductor, 1, leads to the plate B, and a conductor, 2, to the nutD. Upon turning the screw E electric connection between the plate 0 andnut D is either completed or broken, dependent upon the direction of theturning. The conductors 1 2 lead directly or indirectly from the sourceof electricity, and may be placed inside of gas or other suitable pipesor tubing, as shown in Fig. 3, or, as in Fig. 1, may be brought to thelamps in any convenient man- .ner. From this it may be readily seen thatit the lamp, Fig. 2, be placed in the socket H, Fig. 3, one spring, 3,bears against and forms electrical contact with one plate-sayBwhile theother spring, 4-, bears against and forms electrical contact with theother plate, (J. If screw E be turned so as to impinge firmly on plate(3, a complete circuit is formed 'via wire 1, plate B, spring 3, wire 5,incandescent loop P, wire 6, spring 4, plate (J, screw E, nut D, wire 2,the total lighting effect, a dim lighting effect, or no lighting efiectbeing due respectively to a fine contact, a slight contact, or nocontact between E and O.

From this description it is evident that the lamp is an article completein itself, consisting substantially of an inclosing globe entirely ofand sealed by glass, an incandescing material, and conductors therefromto spring-contacts on an insulated base-piece, and without regulating orheat-absorbing devices, but capable of being placed in position for usewithout any attention or adjustment.

While I have shown contact-springs upon the exterior of the cylinder Mon the neck of the lamp, and contact-plates upon the interior of thesocket or holder, it is evident that this relation could be reversed-theplates being placed on the neck otthe lampsand the springs in thesocket--withoutdepartingfrom the spirit of my invention or requiring anyfurther invention. ltis also evident that the lamp could be soconstructed that its neck would embrace the holder, instead of beingplaced therein.

What I claim isl. A separate electric lamp, consisting essentially of aninclosing globe entirely of glass, an incandescing material securedtherein, conductors leading thereto and sealed in the glass where theypass therethrough, and a base of insulating material in which the neckof the globe is secured, said base being provided with metalliccontact-plates to which the conductors leading into the globe aresecured at their outer ends.

2. A socket for an electric lamp, adapted to be placed upon a gas-pipeor other suitable support, and provided with contact-plates forming theterminals of an electric circuit, and arranged substantially as setforth.

3. A socket for an electric lamp, adapted to be placed upon agas-pipeorother suitable support, and provided with contact-platesforming the terminals of an electric circuit, and also provided with acircuit-controller inserted in one branch of the circuit for controllingthe circuit, substantially as set forth.

4. The combination ot'aseparateelectriclamp made and provided with abase, as described, and a socket adapted to be secured upon a gas-pipeor other suitable support, and provided with contact-plates, as setforth, so that the two may be readily attached or detached,substantially as set forth.

5. The combination, with a bracket or chandelier arm or other gas orhollow pipe containing the wires of an electric circuit, of a socket orholder for an electric lamp adapted to be secured therein and to receiveand support the lamp, and provided with contact-plates forming theterminals of the wires of the electrical circuit, substantially as setforth.

6. The combination of an electric lamp having an insulated base providedwith contactplates thereon, and a socket or holder for receiving andsupporting the lamp, provided with contact-plates forming electricalconnection with and completing the circuit through the plates on thebase of the lamp, substantially as set forth.

In testimony whereot'I have hereunto affixed my signature this 28th dayof January, A. I). 1880.

THOS. A. EDISON.

\Vitnesses:

(J. P. Mora, SAM. 1). Mom.

